This folder contains correspondence regarding the business of the Edison Iron Concentrating Co. Most of the letters are by Walter S. Mallory, secretary-treasurer and general manager. Some of the documents pertain to production difficulties at the company's Michigan ore milling plant. There are also letters relating to the distribution of stock and other financial matters.

Approximately 50 percent of the documents have been selected. The following categories of documents have not been selected: routine correspondence regarding meeting announcements, stock assessments, and stock transfers.